The effective supply of the public goods is always an important and controversial issue in western economic.

公共物品的有效供给历来是西方经济学者争论的一个重要课题。

youdao

The effective supply of the public goods is always an important and controversial issue in western economic.

公共物品的有效供给历来是西方经济学者争论的一个重要课题。

youdao